Deep well pump



Nov. 15,1932.

R. u. GRANT 1,887,886 7 DEEP WELL PUMP Filed Oct. 24, 1931 2 Sheets-Sheet l gwuentor,

fla /an? Patented Nov. lt'a, 1932 v UNITED STATES PATENT OFFICE ROBERT GRANT, OF BRECKENRIDGE, TEXAS, ASSIGNOR OF ONEFHALF T0 '1. H. P. DUNCAN, OF FORT WORTH, TEXAS DEEP WELL PUMP This invention relates to pumps and pertains particularly to'a deep well pump.

The primary object of the present invention is to provide a pump mechanism which Works submerged in the liquid to be lifted and which is particularly designed for removing liquid such as water, oil or the like from wells which are too deepxforthe ordinary surface operated pumping apparatusto handle.

A further object of the invention is to pro vide a pump mechanism which is power operated and controlled by a compressed air actuated piston member which is directly connected with the pump piston.

A still further object of the invention is to provide a pump structure having a completely encased piston and novel means for preventing the creation of a reduced pressure behind the piston when the same is traveling downward or compressing air behind when the piston is performing a working stroke and at the same time taking'in liquid and moving the same into the carry-elf, pipe, through the top or upper end'of the piston body.

A still further object of the invention isto provide a compressed air operated pumping piston including an actuating piston, in which the movement of the pumping piston and connecting rodcontrols the admission of compressed air to the cylinder enclosing the actuating piston.

The invention will be best understood from a. consideration of the following detailed description taken in connection with the accompanying drawings forming part of this specification, with the understanding, however,

' that the invention is not confined to any strict conformity with the showing of the drawings but may be changed or modified so long as such changes or modifications mark no material departure from the salient features ofthe invention as expressed in claims.

In the drawings Figure 1 is a view in side elevation of the pumping mechanism embodying the present i v i Figure 2 is a sectional view taken on the 50 line 22 of Figure 1;

threadably receives the upper end of the the appended Figure 3 is a sectional view taken on the line 33 of Figure 1; y

Figure 4 is a transverse sectional view taken on the line 4--4 of Figalre 3;

' Figure 5 is a sectional view taken on the line 55 of Figure 3.

Referring now more particularly to the drawings-wherein like'numerals of reference indicate corresponding parts throughout the several views, the numeral 1 indicates generally the Water raising piston enclosing cylind'er, while the numeral 2 indicates generally the cylinder enclosing the working piston, these cylinders being connected by'a cylin-' drical casing 3 through the wall of which is cut the longitudinally extending opening or wlndow 4. As shown, the upper end of the casing 3 is interiorly. threaded to receive the lower end of the upper or working piston cylinder 2, while the lower end of this 7 casing is preferably formed relatively thick as indicated-at 5 and provided with the an nular interiorly threaded recess 6 which pump piston cylinder. The lower end of the pump piston cylinder has threadably attached thereto the reducing coupling 7 which is interiorly formed to provide a ball valve seat 8 which receives the ball 9. The smaller or reduced end of this coupling 7 is det'achably connected with a screen 10 of the usual type employed in connection with well pumps.

Within the'cylinder 1 is the water piston 11. This piston is mounted upon the lower end of the tubular rod 12 through which the raised water or other liquid is removed from the well as will be hereinafter fully described. Any suitable means may be employed for securing the piston 11 to the rod 12, the means preferred and here illustrated consisting of holding nuts 13 and 14 mounted respectively above'and below the piston on the rod.

As shown, the lowerr nut 14 secures against 5 the lower face of the piston a cup washer 15, while the upper nut- 13 also secures a cup washer which is indicated by the numeral 16, and an aperturedplate 17 which overlies a pocket or chamber 18 formed in the top surface of the piston as illustrated. Theplate 17 has the apertures 19 formed in a circle and within the chamber 18 there is placed an annular valve plate 20 which is normally maintained in position against the cover plate 17 by means of springs 21.

The wall of the tubular rod 12 is provided with a series of apertures 22 which open into the chamber 18 as shown and the lower end of the rod has threadably secured therein the upwardly opening ball check valve unit which is indicated as a: whole by the numeral 23.

The bottom 5 of the casing 3, which constitutes the head of the pump piston cylinder 1 has formed therethrough 'a pair or more of passages 24. The inner end of each of these passages, that is, the end opening into the cylinder 1 has a spider 25 secured therein as shown, or any other suitable means for supporting a spring 26 which maintains in place against the tubular ball check valve seat 27 which is removably secured in the other end, the valve ball 28. The central portion of this bottom plate 5 also has a suitable passage therethrough for the tubular piston rod 12 and the outer endof this passage from the cylinder 1 is closed by a packing retaining cap 29 which maintains a suitable packing therein around the rod. 3

The ends of the cylinder 2 which will be hereinafter referred to as the power cylinder to distinguish it from the pump cylinder 1, are provided with suitable passages for the extension of the rod 12 therethrough and these passages also have at their outer ends suitable packing retaining glands 30 and 31, as illustrated. Within the power cylinder 2 is a'piston 32 which is mounted upon the hollow piston rod 12 for imparting movement thereto as hereinafter more fully described.

The upper end of the power cylinder 2, which is the end which carries the gland packing structure 30, has a reduced coupling 33 detachably secured thereto, to which is connected the lower end of a casing 34 which houses the rod 12.

A longitudinally extending area of the wall of the power cylinder 2 is made of a greater thickness than the remainder of the cylinder, as indicated at 35, and extending through this thickened portion are the passages 36 and 37 each of which opens at one end into the cylinder 2 adjacent an end of the same while the other ends of these passages open'through the outer face of the thickened portion 35 of the cylinder wall in' relatively close proximity to one another and adjacent the transverse center of the cylinder. These outer ends of the passages 36 and 37 open into the power fluid chest 38 and slidably mounted in this chest, which is closed by the removable plate 39 is a valve 40 of the type commonly known as a D valve.

This valve 40 is designed to move longitudinally in the chesti38 to alternately couple the ends of the passages 36 and 37 with an outlet or exhaust passage 41, through the medium of the recess 42 which is formed in the face thereof. This exhaust port 41 which opens into the power chest 38 and which is constantly covered by the valve 40 and in communication with the chambered area 42 thereof, extends laterally through the part 35 of the cylinder 2 and discharges into the upwardly directed pipe 43.

Entering the power chest or box 38, preferably at one end thereof as shown in Figures 1 and 2, is a pipe 44 through which air under pressure is introduced into thepower box for transmission to the power cylinder 2 and at the oppositeend of the box there extends through the wall thereof and through a suitable packing gland 45, a control rod 46 which is secured to the valve 40 in the manner shown.

Supported within the casing 3 upon suitable guide tracks 47 is a slide rod 48. v This rod 48 has adjustably secured thereon the stops 49 between which moves an operating finger 50 which is carried by a saddle 51 mounted upon the tubular piston rod 12.

Upon a suitable bracket 52 there is mounted a rocker arm 53, one end of which is coupled with the valve rod 54, while the other end is forked as indicated at 55 and the terminals of the fork carry the inwardly directed pins '56 which 'ride in a circumferential grooved collar 57 mounted upon and secured to the rod 48.

From the foregoing description it will be readily apparent that in the operation of the present deep well pump the same is lowered into the liquid of the well by the pipe casing 34 and upon the introduction of compressed air or any other suitable power fluid, into the valve box 38 through the pipe 44, the piston 32 in the power cylinder will be forced to reciprocate therein during which operation the piston 11 will be reciprocated in its cylinder and upon upstroke thereof liquid will be drawn in through the check valve 9 and upon the downstroke the check valve 23 will open and the liquid will be forced to pass into the tubular piston rod 12, With the parts in the positions shown in Figures 2 and 3 the pistons 11 and 32 are just completing their upstroke and further movement of the same in this direction will cause'the finger 50 to shift the slide rod 48 and thus actuate the control valve 40 so as to uncover the port 36 and connect the port 37 with the exhaust port 41. This will permit the power fluid to pass into the upper end of the power cylinder 2 and thus force the piston 32 downwardly and consequently force the piston 11 downwardly also. Upon the downward movement of the pump piston 11 air, or fluid, if the lower part of the casing 3 is submerged, Will be drawn in through the check valves tube 11 on both its up and down strokes.

Having thus described the invention,,what is claimed is 1'. In a pump structure of the character de scribed, a pair of cylinders one constltuting a pumping cylinder and the other a power cylinder, connecting means between the cylinders and maintaining the same in allgnment, a piston in each cylinder, a hollow piston rod passing through each piston and passing entirely through the power cylinder, valved inlet means for and opening through each end of the pumping cylinder, valve means controlling'the passage of fiuid from the pumping cylinder into the hollow rod, means for introducing the power fluid into the power cylinder, valve means for controlling the introduction of power fluid thereinto, and means operating within the space between the cylinders and having connection with said last valve means, for actuating the said last valve means.

2. A pump structure of the character described comprising a pumping piston, a cylinder for said piston, valved inlet means for said cylinder, a power cylinder, a power piston in the cylinder, valve means for alternately introducing a power fluid into the power cylinder at the ends thereof and including an actuating rod disposed longitudinally or" the power cylinder, a casing between and connecting said cylinders and having an opening therein, a piston rod passing through said casing into eachcylinder and having each of said pistons secured thereto, means in and shiftable longitudinally of said casing and connected with said actuating rod for actuating said fluid power controlling valve, and means carried by said piston rod and connecting with said actuating rod at the end of each stroke period of the power piston for actuating said shifting meaIE at such periods, said rod bein valved inlet thereto rom the pump cylinder.

3. A pump structure of the character described comprising a power cylinder and a pumping cylinder arranged in tandem, said power cylinder being threaded about the end adjacent the pumping cylinder, an intermediate cylinder betweenthe power cylinder and pumping cylinder threadably receiving the threaded end of the power cylinder in one hollow and having a v i end and having an integral head at its other end provided in its outer face with an annu-f lar recess, the outer wall of which is provided with screw-threads, said annular recess receiving the adjacent endof the pump cylinder and threadably engaging the same, said intermediate cylinder having an opening through and extending longitudinally of the wall thereof, 'an inlet valve in the end ofthe pumping cylinder oppositethe intermed atev cylinder, a pair of inlet valves in said intermediate cylinder head and opening into the pumping cylinder, a tubular rod extending entirely through the power cylinder and the intermediate cylinder and into the pumping cylinder, a piston upon said rod and in the pumping cylinder, said rod having an inlet valvevin the end which is in the pumping cylinder and further having inlet openings through the wall thereof, said piston having a chamber in the end remote from the inlet valve of the rod and having said rod apertures opening thereinto, an inwardly opening valve controlling the entrance of fluid into. said chamber from the adjacent end of the pumping cylinder, a piston upon said rod in the power cylinder, valve means for alternately introducing a power fluid in the powercylinder upon opposite sidesof the piston therein, a reciprocable actuating rod forsaid valve means, and means upon said tubular rod within the intermediate cylinder and ex tending through the opening in the intermediate cylinder and further alternately connecting with said valve actuating rod at spaced points thereon during the reciprocation of the tubular rod.

4. A pump structure of the character described comprising a power cylinder and a pumping cylinder arranged in tandem, a cylinder in between the power and pumping cylinders and-connecting the same together, said last cylinder having an elongated opening through the wall thereof, valved inlet means in each end of said pumping cylinder, a tubular rod extending through the power cylinder and the intermediate cylinder and into the pumping cylinder, a piston carried upon the tubular rod in the power cylinder, a piston of a motive fluid into the ends of the power cylinder, a rod carried by said sliding valve and extending longitudinally of the power cylinder to a point adjacent the opening in.

the intermediate cylinder, a bracket carried by v the intermediate cylinderadjacent said opening, a rocker arm pivotally mounted upon said bracket and having sliding connection at one end with said valve rod, a second rod mounted within the intermediate cylinder for reciprocable movement longitudinally thereof, stops adjustahly mounted upon said second rod, and a striker finger carried by the tubular rod and disposed between sald stops to alternately engage the same in the operation of the tubular rod to shift the valve and second mentioned rods for the actuation of the valvememher.

5. In a pump structure of the character described, a pair of cylinders arranged in spaced axial alignment, one of said cylinders constituting a power cylinder and the other a pumping cylinder, screw' threads formed exteriorly of each end of the pumping cylinder and of the end of the power cylinder ad jacent the pumping cylinder, a cylindrical casing open at one end and interiorly threaded and threadably receiving the threaded end of the power cylinder, a relatively heavy head closing the other end of the casing and having an annular groove out in its outer surface and threaded to receive one threaded end of the pumping cylinder, valved inlet means threaded onto the other end of the pumping cylinder, a piston in each of said cylinders, a piston rod connecting said pistons and passing through the casing and the power cylinder, the said piston in the pumping cylinder being valved to pass a fluid from the valved inlet end of the pumping cylinder to the opposite side of the piston therein, lead off means for the pumping cylinder, and means for alternately introducing fluid power into the power cylinder at opposite sides of the piston therein to efi'ectits reciprocation.

In testimony whereof I hereunto aflix my signature.

RDBERT U. GRANT.

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